The Current Carried by Bound States of a Superconducting Vortex

Details The Current Carried by Bound States of a Superconducting Vortex The Current Carried by Bound States of a Superconducting Vortex

1996-06-23

arxiv.org/abs/cond-mat/9606162v1

Phys. Rev. B 54 (1996) 10094

Physics

Condensed Matter

17 pages in a RevTex (3.0) file plus 5 Figures in PostScript. Submitted to Physical Review B

Scientific paper

10.1103/PhysRevB.54.10094

We investigate the spectrum of quasiparticle excitations in the core of isolated pancake vortices in clean layered superconductors. Analysis of the spectral current density shows that both the circular current around the vortex center as well as any transport current through the vortex core is carried by localized states bound to the core by Andreev scattering. Hence the physical properties of the core are governed in clean high-$\kappa$ superconductors (e.g. the cuprate superconductors) by the Andreev bound states, and not by normal electrons as it is the case for traditional (dirty) high-$\kappa$ superconductors.

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